diff --git a/Cartfile b/Cartfile
index 899d6e6c..ae467bc7 100755
--- a/Cartfile
+++ b/Cartfile
@@ -1 +1 @@
-github "readium/r2-shared-swift" == 1.2.11
+github "readium/r2-shared-swift" == 1.2.12
diff --git a/Cartfile.resolved b/Cartfile.resolved
index 51ddf9de..b9a5c002 100644
--- a/Cartfile.resolved
+++ b/Cartfile.resolved
@@ -1 +1 @@
-github "readium/r2-shared-swift" "1.2.11"
+github "readium/r2-shared-swift" "1.2.12"